Received mine today by regular USPS.
My only complaint about this device is that if I set the volume level to say, 30 and then if switch of the thing, it resets back to 20.
Anybody know how to avoid that behavior.

Got my players today - here's a list of my thoughts:
both work; both have music pre-loaded on them; both look lightly used (can tell they're not brand new, they have some fingerprint smudges, but nothing major); Windows Explorer recognizes them as a DVD drive (?) and will not accept drag-and-drop files (maybe that will change after I put some batteries in them); different drivers in each (updated one, now am waiting to reboot to see what, if anything, changes).

I guess I will check back in with updates (if anybody cares ).

if you guys use windows media player... it will recognize it. Go to the sync tab...

Mailman came and left... nothing. Wow 17 days and still no product.
I'm still miffed that these were not represented as used or refurb.
This also makes it sound like a NEW package: Model: SIREN-4GB-2PACK

Be careful hooking these to your PC, if they are indeed used. Many viruses target external drives, which is how these show up in explorer. You can make a USB flash drive auto run programs, by tricking the system into seeing it as a CD or DVD drive. That is how external drives that use the U3 system "trick" windows into running the U3 programs when the thumb drive is inserted. A virus could do this also to maliciously load it's code.
I'm not saying you have one, but I deal with cleaning viruses on about 4000 PC's at work. You'd be surprised what they can do.
__________________________________________________________

Here is the deal, TWO 4 Gigabytes MP3 Players.

Plug and play, easy to use, USB cable included, 2.0 interface and a series of other features.
You can fit thousands of your favorite songs, playlists, and albums and still listen to your favorite radio stations.
At work you can use it as an external hard drive or use and abuse the voice recording feature. It comes in handy.
Built-in a 5 band adjustable equalizer and a mic.
There is a lot I could still ask for you may think, and I do as well but at this price it’s a real bargain.

For the expert flingers maximum quantity per order is only 2 and you can only purchase this item once, that’s right only one time.

Fling on you Crazy Flinger and the other ones as well.

Price: $39.99

Condition: Bulk

Brand: SIREN

UPC: 000000000000

Model: SIREN-4GB-2PACK

System Requirements:

* Intel Pentium II 300 MHz or above
* Minimum 128 MB RAM and 150 MB available hard drive space
* USB Port and CD-ROM drive
* Windows ME/2000/XP

What’s included:

* Pro style earbuds
* Carrying case with arm band for convenience
* USB 2.0 cable

The Software installation disk is not included. Click here and you can download the software.

Just to let you guys know, I did end up getting both my players to work, no thanks to the siren tech support (they emailed me some kind of desktop application for updating firmware on USB devices that 1) wouldn't work because my player wasn't recognized as a USB device and 2) hasn't worked even after I got XP to recognize it as a USB drive).

One of my players would do drag and drop using kimota's method of changing the USB settings, but the other one I just installed a different driver on my box and now it works - no firmware update neccessary.

Here are a list of the steps I used to install a usable driver:
1.) Connect the Siren 4GB MP3 Player to the computer via the USB cable
2.) Open Device Manager (Control Panel->System->Hardware->Device Manager)
3.) Find the device in the list
4.) Right-click the device and select 'Properties'
5.) Under the tab 'Driver' choose 'Update Driver...'
6.) Select 'No, not this time' and click 'Next >'
7.) Select 'Install from a list or specific location (Advanced)' and click 'Next >'
8.) Select "Don't search. I will choose the driver to install." and click 'Next >'
9) Select 'USB Device' and click 'Next >'
10.) Click 'Finish'

Driver details:
Siren MP3 Player USB Device
Driver Provider: Microsoft
Driver Date: 7/1/2001
Driver Version: 5.1.2535.0
Digital Signer: Microsoft Windows Publisher

Also, I ordered some batteries from all-battery.com on Friday and they showed up today while my charger order from ThingFling (also on Friday) is still 'Processing'. Maybe we need to get the Royal Court some Red-Bull?

Also, I have one player with a bunch of music on it that doesn't show up in either Windows Explorer or Windows Media Player but will play on the player - any ideas?

I am kind of in the same boat (as viviandjw), except I want to keep (at least some of) the music that came on mine. Anybody have an idea about how I could go about finding music on the players that doesn't show up in Windows?

my hubby was going to use his and it says boot faliure. don't know how to fix that. yes i submmited a ticket and they have not got back to me yet.

Thanks for the advice. I am able to see some of the music that came on the player (they all happen to be mp3 files...I don't know if that makes any difference). I did try showing hidden/system files and no other files showed up, so I don't know what else I can do. I have considered booting up Knoppix or Bart's and see if Linux can see what files are there, and I have also considered running a file recovery program on the mp3 player to see if it can pick any more files up, but just haven't gotten around to trying either of those things yet. I was really hoping that someone would go "I have done this before! All you have to do is..." and then my problem would be solved, but I guess not.

I have tried twice to fling these and so far I keep getting error messages!! Any one else having issues?

I purchase the 2 4GB SIREN players a few weeks ago. One of them worked fine, the other one's power button was broken, so I sent it back. Today a 2GB ILO player arrived. While I appreciate getting a replacement, I'm not very happy with the fact that it is half the capacity, especially seeing they have the 4GB SIREN back on sale this very moment. They clearly have them in stock- so why send me an inferior product replacement?